import turtle
import time
turtle.setup(650.,350,200,200)
turtle.pendown()
turtle.pensize(10)
turtle.pencolor('green')

#四叶草
def draw_clover(radius,rotate):            #参数radius控制叶子的大小,rotate控制叶子的旋转
    for i in range(4):
        direction = i*90
        turtle.seth(60+direction+rotate)   #控制叶子根部的角度为60度
        # turtle.fd(2*radius*pow(2,1/2))   #控制叶子根部的角度为90度
        turtle.fd(4*radius)
        for j in range(2):
             turtle.seth(90+direction+rotate)
             turtle.circle(radius,180)
        turtle.seth(-60+direction+rotate)
        turtle.fd(4*radius)
    turtle.seth(-90)
    turtle.fd(6*radius)

draw_clover(30,45)
time.sleep(5)
